1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
// Copyright (C) 2015 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 26.1.13
description: >
Sets the new value.
info: |
26.1.13 Reflect.set ( target, propertyKey, V [ , receiver ] )
...
4. If receiver is not present, then
a. Let receiver be target.
5. Return target.[[Set]](key, V, receiver).
9.1.9 [[Set]] ( P, V, Receiver)
...
5. If IsDataDescriptor(ownDesc) is true, then
a. If ownDesc.[[Writable]] is false, return false.
b. If Type(Receiver) is not Object, return false.
c. Let existingDescriptor be Receiver.[[GetOwnProperty]](P).
d. ReturnIfAbrupt(existingDescriptor).
e. If existingDescriptor is not undefined, then
i. If IsAccessorDescriptor(existingDescriptor) is true, return false.
ii. If existingDescriptor.[[Writable]] is false, return false.
iii. Let valueDesc be the PropertyDescriptor{[[Value]]: V}.
iv. Return Receiver.[[DefineOwnProperty]](P, valueDesc).
f. Else Receiver does not currently have a property P,
i. Return CreateDataProperty(Receiver, P, V).
...
---*/
var o1 = {
p: 43
};
var result = Reflect.set(o1, 'p', 42);
assert.sameValue(result, true, 'returns true on a successful setting');
assert.sameValue(
o1.p, 42,
'sets the new value'
);
var o2 = {
p: 43
};
var receiver = {
p: 44
};
var result = Reflect.set(o2, 'p', 42, receiver);
assert.sameValue(result, true, 'returns true on a successful setting');
assert.sameValue(o2.p, 43, 'with a receiver, does not set a value on target');
assert.sameValue(receiver.p, 42, 'sets the new value on the receiver');
|
